Concrete-mixer.



G. S. NOBLE.

CONCRETE MIXER.

APPLICATION FILED MAY 9,1904.

Patented Dec. 21, 1909.

2 sums-SHEET 1.

llllli G. S. NOBLE.

' CONCRETE- MIXER.

APPLICATION FILED MAY 9. 1904.

944,102. Patented Dec. 21, 1909.

2 SHEETS-SHEET 2.

STA'llig PATENT ora ion.

GLENN s. NOBLE, or CHICAGO, ILLINOIS.

CON CRETE-MIXER.

- Specification of Letters Patent.

Application filed May 9,

to malaxators or mixing machines designed for mixing concrete or the like.

While it is not the intention to limit the use of this invention to mixing concrete, for convenience in description, it will be considered with regard to such use.

The objects of this invention are toprovide a mixing machine which will be extremely simple in construction and consequently durable in operation; which will be readily fed and discharged; which will thoroughly mix the desired ingredients; and which will not be liable to clog, although the interior is readilyaccessible for cleaning in the event of any tendency of the material to gather on the interior of the drum.

It consists in the combination of a suitable drum with internal mixing devices, a slidable door, means for operating said door and means for turning said drum, and such other features and details of construction as will appear hereinafter.

In the accompanying drawings, Figure 1 is a side elevation of a machine embodying this invention, shown with a. steam engine and boiler mounted with a mixing apparatus. Fig. 2 a top plan view of the same.

Fig. 3 is a sectional View taken on the line 3, 3 of Fig. 1. F ig; 4 is a cross sectional view through the drum showing the door closed. Fig. '5 is a cross sectional view of the drum showingthe door open in position for filling and with the material in the drum. Fig. 6 is a longitudinal sectional view through the drum.

The frame 7 is mounted on a pair of rear wheels. 8 and a pivoted front wheel 9. The axle 10 for the 'front wheel is mounted in a suitable bracket 11 and extends sufiicicntly to engage with a tongue 5 provided with hooks G which fit over said axle. 4 The upper end of the bracket 11 engages with one of the brackets 12, which form a part of the frame and extend upward to support the trunnions 13 of the drum 14. 'The bearings 15 in the brackets 12 are referably provided with rollers as SllOWlllIl Fig.3. The drum 1 may be driven in any desired man- Iat ented Dec.

1904. Serial No. 207,021.

! ner and as shown, one of the trunnions is ex-. tended to' receive a gear 16 which meshes with a" train of gears ending with the pinion 17 on the shaft of the enginelS. The 0bject of these gears is to reduce thelspeed of;

.the drum to the desired number of-revolutions. The engine l8is supplied with steam' from the boiler 19 which for convenience, is I mounted therewith on the truckcarrying the machine. l 4 Within the drum 14 are one ormore'mixing plates or blades 20 which extend substantially the full length of the drum and Q are of any desired width in proportionof the diameter of the drum. .These platesare to the inner periphery of the drum,

means of U bolts or the like '22 as shown Fig. 4, or by means of bearings 23 as shown in Fig. 5'. The supporting arms of the The action of these sliding or reciprocating plates will be readily understood from Figs.

direction of the arrows, the material will be gathered by the descending plate which lies against the side of-the drum and .a certain portion will be carried up until it is discharged from the plate and simultaneously the plate will slide down on its brackets a limited distance whereby all the material the danger of the cement or concrete gatherwith the drum, or on the plate, will be ob viated. As the drum continues to rotate the plate will again fall to its original*p0- sition in engagement with the drum. In

some instances it may be desired to secure the mixing plates in adjusted, position and adapted to throw the material lengthwise of the drum.

ing 26 which reaches substantially the full brackets 21 are set so that the blades 20wi11 be either radial to the. drum or nearly so.

4, 5 and 6. With the rotating in theing along the line of contact of the-plate prevent their sliding on the brackets. This such deflectors in Fig.6, which will be.

The material is introduced, into the drum through alongitudinal open-' slidablysupported on brackets 21,- secured will be forcibly discharged therefrom and lengtlrof the drum and is closed by means x l of a sliding door 27. The construction and operation; of thisdoorand means for opening andclosing the same are considered as being distinctly unique and as forming an important feature of this invention. The

door 27 slides between the outer surface of the drumlet and guide strips 28 and is stopped at either limit of. its throw by means of lugs or the like 29 on the drum 14.

lVhile the door will operate with more or less'satisfaction when it is made to fit loosely between the drum and the guide strips, I

prefer to place a clearance strip 30 along the rear side of the opening 26 between the-drum connection between the door and the drum.

and the door. This strip will also act as a s'cra'perto' scrape any material clinging'to the inner side ofthe door-back into the drum. A. corresponding strip 3lis also" provided along the forward edge of the opening 26 in order to .receivethe end ofv the door 27 when it is closed'to make tight This strip ispreferably beveled as shown.

Inner guide strips with, or secured to the drum 14:, hold the door. outward as it passes. over the opening 26, The door 27 isprovided with two or more bearings 33' which are secured thereto and receivea shaft 34 extending out at either end a short, distance beyond the heads of thedrum. Pinions'35 are secured to the shaft 34: and engage with curved racks 36 secured to the heads of the drum 14. When the shaft '34 is rotated, the pinions being in engagement with the racks will force the door -either open or shut and will cause both ends of said door to travel evenlyand prevent any binding or sticking. In order to turn the shaft 34, it is provided at either end with hand wheels or the like 37, which'may besecured thereonin any desired manner.

The pinions being of comparatively smaller diameter in proportion to the hand wheels vwill give a considerable leverage whereby the door may be forced through any mate rial sticking within its pathway. In order to hold the door in closed or open position, spring catches 38 and 39 are provided on the head of the drum so that one of the hand wheels will engage with said springs when the door is opened or closed. These springs simply curve outward and frictionally engage with the inner surface of the hand wheel. While other devices would readily suggest themselves for serving the same purpose, these are found to-be exceedingly serviceable in practice.

In order to open the door, it is only necessary to give one of the hand wheels a slight pull or turn at'the proper time to release it fro he spring 38, when the weight of the door Wlll throw it to open position. On accountof this,' the operator is enabled to open the doorto discharge the drum, while the drum' is running at full speed. As the door falls to the open position, the hand 32 formed integrally ame wheel engages with the spring."

locks'the door open. While I have found this arrangement sutiicient for the successful operation of the mixer, a lever-4:0 may be pivoted-toany "convenient portion of the framoij and swung down to engage with one of the wheels 37 '-in'order to turnthe saine substantially as shown in Fig. 5. case, the drum being rotated in the direc tionshown by the arrow, .the hand wheel '37 must be turned inthe opposite direction in order to open the door. This is accomthe wl eel'37, and as the wheel passes along under the lever 40, it will be rotated backv wardly and therefore will open the door. The material is fed into the machine in any In this plished by pressing down the lever 40, which engages ,frictionally with the periphery ofv convenient manner as from wheelbarrows runup on a platform 41. 'It is discharged onto a chute or hopper 42 which rests at one side on-the frame 7 and is adjustably supported .on the opposite side by means of bolts or the like 43.

Having thus described my invention which I do not wish to limit to any of the exact details of construction or methods of opera-' tion, it being particularly noted. that otherv means may be used. for driving the drum,

what I. claim and desire to secure by Letters "of a drum having longitudinal opening in the side thereof, a curved slidable door for said opening, said drum and door being formed of imperforate material, a scraper strip along one side of said opening over which the door is adapted to slide, a means for sliding said door so that both ends will be given a positive uniform movement.

3. In a machine of the character set forth,

the combination of a revoluble drum provided with a longitudinal opening, a curved slidable door for said opening, guides for said door, bearings on-said door, a rod engaging with saidbearings, pinions on said rod, racks secured to the end of said drum with which said pinions engage, and means for turning said rod.

4. In a machine of the character set forth,

the combination of a revoluble drum provided with a longitudinal opening of substantially the same length as said drum, a

slidable door for said opening, guides for said door, ashaft revolubly secured to said door,pinions on said shaft, racks secured said opening, guides for said door, a shaft revolubly secured to said door, pinions on said'shaft, curved racks secured to the ends 7 of said drum 1 and meshing with said p1n-.

ions, hand wheels on said shaft and catches on said drum for holding the door in open or closed positions respectively.

(3. In a n1a1axator, the combination of a 'revoluble drunr provide'd with closed ends and with a longitudinal opening therein,

trunnions and bearings for supporting said drum, a ,slidable door-I for said opening, means for holdingsaid door as it is slid, a shaftrevolubly'seci'lred to said. door, pinions on-said sha-ft, racks 0| said drum e117.

- gaging with said pinions hand wheels on said shaft and springs on said drum adapt ed to engage with said hand wheels when the door is in open or closed position.

7. The combination of a revoluble drum provided with an opening'in the periphery thereof, a slidable door, a shaft secured to said door, gears on said shaft, gear racks on said drum with which said gears enga' e,

and means for turning said shaft while t e drum is rotating.

8. In an apparatus of the character set forth, the combination of a revoluble drum,'

blade supporting members arranged substantially radially in said drlun,and a blade slidably mounted on said members.

9. The combination of a l'eyoluble mixing drum or the like, radially reci rocat-ing mixing blades for carryingup an'c turning over material in-saiddruin, and longitudinal deflectors in said d-runi..'

GLENNv S. NOBLE Witnesses g M. C. Surrnmm, W. E. ESTRY. 

